Display screen or portion thereof with an animated graphical user interface



FIG. 1 illustrates a front view of a display screen or portion thereof with an animated graphical user interface (GUI) showing a first image in the sequence showing the new design;

FIG. 2 illustrates a second image thereof;

FIG. 3 illustrates a third image thereof;

FIG. 4 illustrates a fourth image thereof;

FIG. 5 illustrates a fifth image thereof;

FIG. 6 illustrates a sixth image thereof;

FIG. 7 illustrates a seventh image thereof;

FIG. 8 illustrates an eighth image thereof;

FIG. 9 illustrated a ninth image thereof; and,

FIG. 10 illustrates a tenth image thereof.

The rectangular dot-dash broken-line perimeter illustrates a display screen. The dashed broken lines outside this perimeter illustrate portions of an electronic device. The dashed broken lines within this perimeter illustrate portions of a graphical use interface. The broken lines form no part of the claimed design.

The appearance of the animated images sequentially transitions between the images shown in FIG. 1-10. The process or period in which one image transitions to another forms no part of the claimed ornamental design. 

CLAIM The ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 